tamerlan tsarnaev, identified as suspect number one. tsarnaev later dies at the hospital, strapped to his body, bombs. >> this was a trauma arrest, multiple injuries, probably we believe a combination of blasts, potentially gunshot wounds. >> how many gunshot wounds. >> unable to count. >> i'm sorry, i didn't hear the rest of that. >> probably a blast injury also. >> blast meaning one? >> explosive device, possibly shrapnel, thermal injuries. >> describe where it was? >> it was pretty much throughout the trunk, multiple wounds. >> would it be consistent with perhaps a bomb strapped -- >> unclear. i think the medical examiner will be able to conclusively say that. >> reporter: police cessa say tsarnaev's brother manages to escape, running over his body's body, scattering a line of police to get away. the younger tsarnaev is armed and dangerous and may have explosives strapped to his body two. police evacuate watertown and surrounding neighborhoods warning them in robocalls. >> hello. this is detective coners with the watertown police dep